Molding apparatus and method of molding articles



Feb. 17, 1931. H. 1.. BRADLEY MOLDING APPARATUS AND METHOD OF MOLDING ARTICLES Filed July 21, 1923 8. H7 Z V fifi x mm I- A I v %m is=lm mmmr% N H m H F U w 5 15 0 A A 5 QZWWZVIIZHQFJM H- /U am 9\ m L J A TTORNQ ner and held suspended over the mold 2 while a charge 18 of divided material is placed into said mold. The stem 8 is then inserted in the die 3 and the die placed within the mold so that the end of the stem extends into the material to be molded.

,The die-3 has considerable massand the mere dropping of it into the mold will slightly compress the material therein and force out most of the air therefrom.

However,to insure the removal of the air, the material may be tamped slightly with the die 3. v a

'The weight 4 is then released and falls upon the die 8 with greatforce, applying ahigh pressure practically instantaneously to the material within the mold and forming placed, a die having a recessin one end thereit into a firm solidarticle. H I d In practice, a hammer capable of deliver.- ing a blow. of approximately 1,200 foot vpounds has been found satisfactory for formflow when subjected to the impact of a ham mer, so that the composition fills the entire mold andbecomes bound together in a solid homogeneous mass.

This invention s, ofcourse, susceptible of various modifications and adaptations within thescope of the appended claims, 7

WVhatIcla-imis; p 1.. An apparatus, for Y forming -molded articles from divided material, comprising a mold for containing, the material, die operating in sand mold, and having means for holding an article to 'be partially embedded in the material to be molded, and

means to provide a sudden impact on 'said 7 die for compressing the material. 7

24An apparatus for forming molded articles from divided material, comprising a' mold into which the material to be molded is of to 'recelvea pair of shells for holding-a stem within said recess, and means for 1mparting-pressure to said die, to thereby com press the material. I

Y are;

3. An apparatus forz 'forming' 'molded articles from d vided mater al, compris nga base having upright guides and afmoldsup ported therebetweenfsaid mold having movable means forming the bottom thereof, for

' ejecting the molded article, a die operating ins'ald moldhavinga recess infone rend there- V f. eedar aali fsb i di-Ql fi said r recess, and a hammer slidably mounted on said guides to impart pressure to said die to compress'the divided material.

4. An apparatus, for forming molded articles from divided material, comprising a mold, a die operating in saidmold and having means for holding an article to be in serted in the material to be molded, a plunger operating in the opposite end of said mold .and forming a bottom therefor and adapted to eject the finished article there from, and means for providing a sudden'impact to said die for compressing the material.

5. An apparatus for forming molded articles comprising a frame, an anvil car'- ried by said frame, amold supported by said anvil, a 'die'operating-in said" mold, and impact means slidable in said frame to impart a sudden high impact to said die to compress instantaneously the material in said mold into a homogeneous mass. v

6. An apparatus for forming molded articles comprisinga frame, an anvil carried by said frame, a mold supported by said anvil, a die operating in said mold and having means to hold an article to be partially embedded in the material'to be molded, and

impact means. slidable in said frame to im part a sudden high impact to said dieto compress instantaneously the material in said mold intoa homogeneous'mass. 1'

7. The method of forming molded articles which consists in placing divi'ded'material into a mold,then applying means for allowing' the air to escape therefrom, then inserting the die containing the stem of said article intosaid mold and applymg a su den impact upon said die for compressing article from the mold.

the material, and finally ejecting the molded 8. A method of. forming a molded article,

comprising'placing a' quantity of moldable material in a mold, tamping said" material to remove "the air therefrom, corlring the mold with a die to'exclude the air therefrom, and then applying pressure to said die to compress said material. i

9 A method of forming a molded article, comprisingplacing a quantity of moldable material n a mold, t amping said material'to remove the air therefrom, corking the mold I with a die to exclude the air therefroimand i then applying a sudden impact 'to. said die to compress said material. I

10. A methodiof forming a molded article,

' comprising placing a quantity of moldable material ma mold,'ta mp1ng said matenalto 7 remove the air therefrom with a die carrying "a stem for said article, and then applying pressure to said die to compress said material andemloed saidstem.

In witnesss whereof, have "hereunto subscribed my name.

r naarn ,Bin nLElii 

